CN107859137B - Method for controlling sewage in drainage system to be converged into storage facility during rainfall - Google Patents
Method for controlling sewage in drainage system to be converged into storage facility during rainfall Download PDFInfo
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- CN107859137B CN107859137B CN201711039607.0A CN201711039607A CN107859137B CN 107859137 B CN107859137 B CN 107859137B CN 201711039607 A CN201711039607 A CN 201711039607A CN 107859137 B CN107859137 B CN 107859137B
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/02—Arrangement of sewer pipe-lines or pipe-line systems
Abstract
The invention discloses a method for controlling sewage in a sewage intercepting pipe of each section in a drainage system to be converged into a storage facility during rainfall, which preferentially distributes water with higher water pollution degree in each section to the tail end of the system (namely the tail end of the storage facility) through the sewage intercepting pipe by reasonable configuration under the condition of utilizing the existing resources to the maximum extent, and then enters a sewage treatment plant for treatment. Therefore, the pollution degree of sewage in the splitting area can be reduced as much as possible, clean rainwater is prevented from being discharged into a sewage treatment plant, the load of the sewage treatment plant is reduced, and the optimal configuration of the existing resources is realized. The method of the invention aims at different pollution degrees of sewage and rainwater which are collected into the storage facility at the same time in different partitioned areas in the system, carries out reasonable distribution according to the pollution degree of the water body in each partitioned area, and carries out rapid and effective discharge treatment on the water body from the areas with different pollution degrees in a targeted manner, thereby realizing reasonable discharge of the water body.
Description
Technical Field
The invention belongs to the technical field of drainage system regulation and control, and particularly relates to a method for controlling sewage in sewage intercepting pipes of each area in a drainage system to be converged into a storage facility during rainfall.
Background
In the current society, the urbanization is developed more and more rapidly, the area of a city is larger and larger, the structure of a municipal drainage pipe network is more and more complex, and the treatment pressure of a municipal water body treatment system is larger and larger.
Traditional urban pipe network system all adopts a big rainwater processing system to be responsible for a very big catchment region, because catchment region is too big, does not fully consider the delay time of rainwater on pipeline or surface runoff, leads to a large amount of mixings of initial stage rainwater and later stage rainwater. For example, a regulation and storage tank is built in a region close to a municipal sewage treatment system in a city, and assuming that an M region is 1Km away from the regulation and storage tank, municipal rainwater in the M region is directly discharged to the regulation and storage tank through a pipe network, and the time for completely discharging the initial municipal rainwater in the M region to the regulation and storage tank is T1. For the region far away from the storage tank beyond the region, assuming that the straight distance from the N region to the storage tank is 10km, and the time for the initial city rainwater in the N region to be completely discharged into the storage tank is T2, the time is obviously far greater than T1 in T2. And after the storage tank is full, the excess rainwater begins to be automatically discharged into the natural water body, and the time from the beginning of collecting the rainwater to the beginning of discharging into the natural water body of the storage tank is T3. In practical operation, if only the rainwater discharge condition of the M area is considered, namely the initial rainwater of the M area can enter the sewage treatment system through the storage tank, and the clean rainwater at the later stage can be discharged to the natural water body, T3 is required to be larger than T1, once T3 is exceeded, the storage tank immediately discharges to the natural water body, and the rainwater flowing to the storage tank in the N area is still the initial rainwater with serious pollution at the moment, namely T3 is smaller than T2, and the rainwater can certainly cause serious pollution when discharged to the natural water body.
If only the rainwater drainage condition of the N area is considered, namely T3 is larger than T2, the initial rainwater of the N area can enter the municipal sewage treatment system through the regulating storage tank and is well treated. However, for the M area, a large amount of later-stage clean rainwater in the M area is also discharged into the municipal sewage treatment plant within the time that the regulation and storage tank discharges the initial rainwater in the N area, and the discharge condition causes great treatment pressure on the municipal sewage system. In addition, when the system is in actual operation, pipe networks in the M area and the N area are generally in a communicated condition, and due to the difference of distances and the detention effect on the way, the initial rainwater in the N area can seriously pollute the clean rainwater in the later period of the M area, and the unreasonable rainwater discharge condition can be caused.
At present, a technical solution to the above problems has been proposed in the prior art, that is, an urban pipe network system is subdivided according to unit areas by using a fragmentation processing method, but in the process of dividing the urban pipe network system according to unit areas by using a fragmentation processing method, especially for the division of some old urban areas, there is no sewage main pipe in each unit area, and in the face of such a situation, domestic sewage and rainwater can only be discharged through the rainwater main pipe to a remote natural water body. At this time, a sewage intercepting box culvert needs to be laid in the urban pipe network system to temporarily replace the function of a sewage main pipe. However, such pipe network systems are usually suitable for use in sunny days, and when rainwater falls temporarily, the maximum flow of the sewage intercepting box culvert is limited due to the limited treatment capacity of the sewage treatment plant in the pipe network; when heavy rain and heavy rain occur, water bodies in all unit areas cannot be discharged to a sewage treatment plant at the same time in time, and water logging disasters of different degrees in all unit areas are caused.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a method for controlling sewage in the sewage intercepting pipes of each area in a drainage system to be converged into a storage facility during rainfall. The method is suitable for the situation that the total amount of sewage flowing into the storage and regulation facilities in each district is larger than the maximum flow rate which can be circulated by the storage and regulation facilities and/or the maximum capacity which can be processed by a sewage treatment plant at the moment when the rainfall occurs, and can be used for rapidly and effectively discharging and processing the water bodies in the areas with different pollution degrees in a targeted manner.
The purpose of the invention is realized by the following technical scheme:
a method for controlling sewage in a sewage intercepting pipe of each section in a drainage system to be converged into a storage facility during rainfall, wherein the drainage system comprises a plurality of sections divided according to areas, the sewage intercepting pipe of each section and the storage facility; the sewage intercepting pipes of the various areas are connected with a storage and regulation facility, and the tail end of the drainage system (namely the tail end of the storage and regulation facility) is connected with a sewage treatment plant;
A) when the storage facility does not reach the upper accommodation limit, the flow of the sewage intercepting pipes of each section is not controlled, and when the sewage interception of a certain section is finished, the sewage intercepting pipes of the corresponding section are closed; and/or
B) When the storage regulation facility reaches the upper limit of the accommodation, the following control method is adopted:
assuming that the maximum flow rate which can be actually accepted by the end of the system (namely the end of the storage facility) is Q, Q is the minimum value of Q1 and Q2, wherein Q1 is the maximum flow rate of the sewage treatment plant capable of treating the sewage, and Q2 is the maximum flow rate of the storage facility discharged to the sewage treatment plant;
the method comprises the following steps:
monitoring the pollution degree of the water body in the sewage interception pipes of each plot, and controlling the flow rate of the sewage interception pipes of each plot, which are converged into the tail end of the system (namely the tail end of the storage facility), according to the different pollution degrees, so that the sum of the flow rates of the sewage interception pipes of each plot is equal to the maximum flow rate Q actually accepted by the tail end of the system (namely the tail end of the storage facility), wherein the method comprises the following steps:
1) when the water pollution degree is different: opening the sewage intercepting pipes of the corresponding areas according to the sequence of the water pollution degrees in the sewage intercepting pipes of the areas from large to small until the sum of the flow rates of the sewage intercepting pipes of the areas is equal to the maximum flow rate Q which can be actually accepted by the tail end of the system (namely the tail end of the storage facility);
2) the water pollution degree is the same: controlling the flow rate of the sewage interception pipes of each sector to enable the sum of the flow rates of the sewage interception pipes of each sector to be equal to the maximum flow rate Q actually accepted by the tail end of the system (namely the tail end of the storage facility), wherein the control method selects one of the following methods:
(a) controlling the flow of the sewage interception pipes of each chip area to be the same;
(b) controlling the flow of the sewage interception pipes of each corresponding wafer area according to the area proportion of the catchment area corresponding to each wafer area;
(c) and controlling the flow rate of the sewage interception pipes of each corresponding zone according to the proportion of the flow passage area of the sewage interception pipe of each zone.
According to the invention, step 1) comprises the following steps:
monitoring the water quality of the water body in the sewage interception pipes of each section, according to the sequence of the water body pollution degree (the concentration of pollutants in the water body) from large to small, namely C1> C2> C3> … > Cm > … > Cn, firstly opening the sewage interception pipe corresponding to the pollutant concentration C1, when the flow rate at the tail end of the system (namely the tail end of the storage facility) is still lower than Q, opening the sewage interception pipe corresponding to the pollutant concentration C2, when the flow rate at the tail end of the system (namely the tail end of the storage facility) is still lower than Q, continuing to open the sewage interception pipe corresponding to the pollutant concentration C3, and so on, when the sewage interception pipe corresponding to the pollutant concentration Cm is opened, the flow rate at the tail end of the system (namely the tail end of the storage facility) exceeds Q, properly adjusting the flow rate on the sewage interception pipe corresponding to the pollutant concentration Cm, and enabling the flow rate at the tail end of the system (namely the tail end of the storage facility) to be equal.
Preferably, step 1) specifically comprises the following steps:
monitoring the water quality of the water body in the sewage intercepting pipes of each section, according to the sequence of the water body pollution degree (the concentration of pollutants in the water body) from large to small, C1> C2> C3> … > Cm > … > Cn, firstly, opening the sewage intercepting pipe corresponding to the pollutant concentration C1, when the water switch on the sewage intercepting pipe corresponding to the pollutant concentration C1 is opened to the maximum value, the flow at the tail end of the system (namely the tail end of the storage facility) is still lower than Q, then opening the sewage intercepting pipe corresponding to the pollutant concentration C2, when the water switch on the sewage intercepting pipe corresponding to the pollutant concentration C2 is opened to the maximum value, the flow at the tail end of the system (namely the tail end of the storage facility) is still lower than Q, then continuing to open the sewage intercepting pipe corresponding to the pollutant concentration C3, and so on, when the water switch on the sewage intercepting pipe corresponding to the pollutant concentration Cm is opened to the maximum value, the flow at the tail end of the system (namely the storage facility) exceeds Q, and properly adjusting the water conservancy switch on the sewage interception pipe corresponding to the pollutant concentration Cm to enable the flow at the tail end of the system (namely the tail end of the storage facility) to be equal to Q.
According to the invention, the method further comprises:
3) setting a pollutant concentration standard emission value C0; when the water pollution degree of a certain area reaches the set pollutant concentration standard discharge value C0 and the sewage interception of the area is finished, the sewage interception pipe corresponding to the area is closed, and the flow of the sewage interception pipes of other areas is continuously controlled according to the method.
Preferably, the pollutant concentration standard discharge value C0 is set in the control unit of the control system according to the environmental capacity of the natural water body discharged and the degree of water pollution in the parcel.
According to the invention, the fact that the water pollution degree of a certain area reaches the set pollutant concentration standard discharge value C0 means that the water pollution degree of a certain area is smaller than the set pollutant concentration standard discharge value C0.
According to the present invention, the environmental capacity of the discharged natural water body may be a natural water body such as rivers, lakes and seas; when the environmental capacity of the natural water body is larger (such as ocean), the pollutant concentration standard emission value C0 can be properly increased; when the environmental capacity of the natural water body is small (such as a lake), the standard emission value C0 of pollutant concentration can be properly reduced.
According to the invention, the control of the flow rate of the sewage intercepting pipes of the corresponding areas according to the proportion of the flow channel area of the sewage intercepting pipes of the areas is to distribute the flow rate of the sewage intercepting pipes of the corresponding areas according to the proportion of the flow channel area of the sewage intercepting pipes of the areas, and make the sum of the flow rates of the sewage intercepting pipes of the areas equal to Q.
Preferably, the proportion of the flow passage area of each plate sewage intercepting pipe is the same as the proportion of the flow rate distributed by the corresponding plate sewage intercepting pipe.
According to the invention, the control of the flow rate of the sewage intercepting pipes of the corresponding areas according to the proportion of the areas of the catchment areas corresponding to the areas of the areas is to distribute the flow rate of the sewage intercepting pipes of the corresponding areas according to the proportion of the areas of the catchment areas corresponding to the areas of the areas, and enable the sum of the flow rates of the sewage intercepting pipes of the areas to be equal to Q.
Preferably, the proportion of the flow passage area of each plate sewage intercepting pipe is the same as the proportion of the flow rate distributed by the corresponding plate sewage intercepting pipe.
According to the invention, the storage facilities comprise storage ponds, storage box culverts, sewage intercepting box culverts, deep tunnels or shallow tunnels and the like.
According to the invention, the drainage system further comprises water switches arranged on the sewage intercepting pipes of the respective areas.
According to the invention, the drainage system also comprises a control system, wherein the control system comprises a device for monitoring the water quality of the water body and a control unit in signal connection with the device; the control unit is in signal connection with the water conservancy switches on the sewage intercepting pipes of the various areas; the monitoring device is used for monitoring water quality, generating water quality monitoring signals, and transmitting the generated water quality monitoring signals to the control unit, and the control unit controls the opening degree of the water conservancy switch on the sewage intercepting pipe of each section according to the received water quality monitoring signals.
According to the invention, the device for monitoring the water quality of the water body is a water quality detector, an online COD monitor, an online ammonia nitrogen monitor, an online TSS monitor, an online BOD monitor and an online NH3The device for monitoring the water quality of the water body can monitor the concentration of pollutants in the water body, wherein the pollutants comprise TSS, COD, BOD, NH, etc3-N, TN or TP.
According to the invention, the water quality detector can detect the water quality of the water body by adopting an electrode method, a UV optical method, an optical scattering method and the like.
According to the invention, the water conservancy switches on the sewage intercepting pipes of the various sections are respectively and independently selected from one of valves (ball valves, gate valves, knife gate valves, butterfly valves, lifting rubber plate intercepting check valves and the like), gates (upper opening gates, lower opening gates and the like), weir gates (upper opening weir gates, lower opening weir gates, rotary weir gates and the like) and flap valves (intercepting flap valves and the like).
According to the present invention, the division according to the area is not limited, and may cover a large area, or may cover a small area, for example, the division may be performed according to an area of 0.04 to 2 square kilometers. One or more storm water treatment facilities may be included in the area.
According to the invention, the catch-off pipes of the individual sectors are connected to a rainwater treatment facility of the sector.
According to the invention, the storm water treatment facility is selected from at least one of a storage facility, an on-line treatment facility and a diversion well.
The invention also provides a control system suitable for the method, wherein the control system comprises a device for monitoring the water quality of the water body and a control unit in signal connection with the device; the control unit is in signal connection with the water conservancy switches on the sewage intercepting pipes of the various areas; the monitoring device is used for monitoring water quality, generating water quality monitoring signals, and transmitting the generated water quality monitoring signals to the control unit, and the control unit controls the opening degree of the water conservancy switch on the sewage intercepting pipe of each section according to the received water quality monitoring signals.
According to the invention, the device for monitoring the water quality of the water body is a water quality detector, an online COD monitor, an online ammonia nitrogen monitor, an online TSS monitor, an online BOD monitor and an online NH3The device for monitoring the water quality of the water body can monitor the concentration of pollutants in the water body, wherein the pollutants comprise TSS, COD, BOD, NH, etc3-N、TN or one or more of TP.
According to the invention, the water quality detector can detect the water quality of the water body by adopting an electrode method, a UV optical method, an optical scattering method and the like.
The invention has the beneficial effects that:
(1) under the condition of utilizing the existing resources to the maximum extent, the method preferentially distributes the water bodies with higher water body pollution degrees in each zone to the tail end of the system (namely the tail end of the storage facility) through the sewage interception pipe through reasonable configuration, and then enters the sewage treatment plant for treatment. Therefore, the pollution degree of sewage in the splitting area can be reduced as much as possible, clean rainwater is prevented from being discharged into a sewage treatment plant, the load of the sewage treatment plant is reduced, and the optimal configuration of the existing resources is realized.
(2) The method of the invention aims at different pollution degrees of sewage and rainwater which are collected into the storage facility at the same time in different partitioned areas in the system, carries out reasonable distribution according to the pollution degree of the water body in each partitioned area, and carries out rapid and effective discharge treatment on the water body from the areas with different pollution degrees in a targeted manner, thereby realizing reasonable discharge of the water body.
(3) The method of the invention is simple and easy to operate.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that various changes or modifications can be made by those skilled in the art after reading the disclosure of the present invention, and such equivalents also fall within the scope of the invention.
Example 1
A method for controlling sewage in a sewage intercepting pipe of each section in a drainage system to be converged into a storage facility during rainfall, wherein the drainage system comprises a plurality of sections divided according to areas, the sewage intercepting pipe of each section and the storage facility; the sewage intercepting pipes of the various areas are connected with a storage and regulation facility, and the tail end of the drainage system (namely the tail end of the storage and regulation facility) is connected with a sewage treatment plant;
A) when the storage facility does not reach the upper accommodation limit, the flow of the sewage intercepting pipes of each section is not controlled, and when the sewage interception of a certain section is finished, the sewage intercepting pipes of the corresponding section are closed; and/or
B) When the storage regulation facility reaches the upper limit of the accommodation, the following control method is adopted:
assuming that the maximum flow rate which can be actually accepted by the end of the system (namely the end of the storage facility) is Q, Q is the minimum value of Q1 and Q2, wherein Q1 is the maximum flow rate of the sewage treatment plant capable of treating the sewage, and Q2 is the maximum flow rate of the storage facility discharged to the sewage treatment plant;
the method comprises the following steps:
monitoring the pollution degree of the water body in the sewage interception pipes of each plot, and controlling the flow rate of the sewage interception pipes of each plot, which are converged into the tail end of the system (namely the tail end of the storage facility), according to the different pollution degrees, so that the sum of the flow rates of the sewage interception pipes of each plot is equal to the maximum flow rate Q actually accepted by the tail end of the system (namely the tail end of the storage facility), wherein the method comprises the following steps:
1) when the water pollution degree is different: opening the sewage intercepting pipes of the corresponding areas according to the sequence of the water pollution degrees in the sewage intercepting pipes of the areas from large to small until the sum of the flow rates of the sewage intercepting pipes of the areas is equal to the maximum flow rate Q which can be actually accepted by the tail end of the system (namely the tail end of the storage facility);
2) the water pollution degree is the same: controlling the flow rate of the sewage interception pipes of each sector to enable the sum of the flow rates of the sewage interception pipes of each sector to be equal to the maximum flow rate Q actually accepted by the tail end of the system (namely the tail end of the storage facility), wherein the control method selects one of the following methods:
(a) controlling the flow of the sewage interception pipes of each chip area to be the same;
(b) controlling the flow of the sewage interception pipes of each corresponding wafer area according to the area proportion of the catchment area corresponding to each wafer area;
(c) and controlling the flow rate of the sewage interception pipes of each corresponding zone according to the proportion of the flow passage area of the sewage interception pipe of each zone.
In a preferred embodiment of the present invention, step 1) specifically comprises the following steps:
monitoring the water quality of the water body in the sewage interception pipes of each section, according to the sequence of the water body pollution degree (the concentration of pollutants in the water body) from large to small, namely C1> C2> C3> … > Cm > … > Cn, firstly opening the sewage interception pipe corresponding to the pollutant concentration C1, when the flow rate at the tail end of the system (namely the tail end of the storage facility) is still lower than Q, opening the sewage interception pipe corresponding to the pollutant concentration C2, when the flow rate at the tail end of the system (namely the tail end of the storage facility) is still lower than Q, continuing to open the sewage interception pipe corresponding to the pollutant concentration C3, and so on, when the sewage interception pipe corresponding to the pollutant concentration Cm is opened, the flow rate at the tail end of the system (namely the tail end of the storage facility) exceeds Q, properly adjusting the flow rate on the sewage interception pipe corresponding to the pollutant concentration Cm, and enabling the flow rate at the tail end of the system (namely the tail end of the storage facility) to be equal.
In a preferred embodiment of the present invention, step 1) specifically comprises the following steps:
monitoring the water quality of the water body in the sewage intercepting pipes of each section, according to the sequence of the water body pollution degree (the concentration of pollutants in the water body) from large to small, C1> C2> C3> … > Cm > … > Cn, firstly, opening the sewage intercepting pipe corresponding to the pollutant concentration C1, when the water switch on the sewage intercepting pipe corresponding to the pollutant concentration C1 is opened to the maximum value, the flow at the tail end of the system (namely the tail end of the storage facility) is still lower than Q, then opening the sewage intercepting pipe corresponding to the pollutant concentration C2, when the water switch on the sewage intercepting pipe corresponding to the pollutant concentration C2 is opened to the maximum value, the flow at the tail end of the system (namely the tail end of the storage facility) is still lower than Q, then continuing to open the sewage intercepting pipe corresponding to the pollutant concentration C3, and so on, when the water switch on the sewage intercepting pipe corresponding to the pollutant concentration Cm is opened to the maximum value, the flow at the tail end of the system (namely the storage facility) exceeds Q, and properly adjusting the water conservancy switch on the sewage interception pipe corresponding to the pollutant concentration Cm to enable the flow at the tail end of the system (namely the tail end of the storage facility) to be equal to Q.
In a preferred embodiment of the present invention, the method further comprises:
3) setting a pollutant concentration standard emission value C0; when the water pollution degree of a certain area reaches the set pollutant concentration standard discharge value C0 and the sewage interception of the area is finished, the sewage interception pipe corresponding to the area is closed, and the flow of the sewage interception pipes of other areas is continuously controlled according to the method.
In a preferred embodiment of the invention, the pollutant concentration standard discharge value C0 is set in the control unit of the control system according to the environmental capacity of the natural water body discharged and the degree of water body pollution in the parcel.
In a preferred embodiment of the present invention, the water pollution level of a certain section reaching the set pollutant concentration standard discharge value C0 means that the water pollution level of a certain section is less than the set pollutant concentration standard discharge value C0.
In a preferred embodiment of the present invention, the environmental capacity of the natural water body discharged may be a natural water body such as rivers, lakes and seas; when the environmental capacity of the natural water body is larger (such as ocean), the pollutant concentration standard emission value C0 can be properly increased; when the environmental capacity of the natural water body is small (such as a lake), the standard emission value C0 of pollutant concentration can be properly reduced.
In a preferred embodiment of the present invention, the controlling of the flow rate of the sewage trap pipe of each corresponding one of the sections in proportion to the flow passage area of the sewage trap pipe of each one of the sections means that the flow rate of the sewage trap pipe of each corresponding one of the sections is distributed in proportion to the flow passage area of the sewage trap pipe of each one of the sections so that the sum of the flow rates of the sewage trap pipes of each one of the sections is equal to Q.
In a preferred embodiment of the present invention, the ratio of the flow passage area of each of the plate-shaped sewage intercepting pipes is the same as the ratio of the flow rate distributed to each of the plate-shaped sewage intercepting pipes.
In a preferred embodiment of the present invention, the controlling of the flow rate of the sewage intercepting pipes of the respective corresponding areas in proportion to the areas of the catchment areas corresponding to the respective areas means that the flow rate of the sewage intercepting pipes of the respective corresponding areas is allocated in proportion to the areas of the catchment areas corresponding to the respective areas so that the sum of the flow rates of the sewage intercepting pipes of the respective areas is equal to Q.
In a preferred embodiment of the present invention, the ratio of the flow passage area of each of the plate-shaped sewage intercepting pipes is the same as the ratio of the flow rate distributed to each of the plate-shaped sewage intercepting pipes.
In a preferred embodiment of the invention, the storage facilities comprise storage ponds, storage culvert, sewage intercepting culvert, deep or shallow tunnels and the like.
In a preferred embodiment of the present invention, the drainage system further comprises a water switch provided on the sewage intercepting pipe of each of the sections.
In a preferred embodiment of the invention, the drainage system further comprises a control system, wherein the control system comprises a device for monitoring the water quality of the water body and a control unit in signal connection with the device; the control unit is in signal connection with the water conservancy switches on the sewage intercepting pipes of the various areas; the monitoring device is used for monitoring water quality, generating water quality monitoring signals, and transmitting the generated water quality monitoring signals to the control unit, and the control unit controls the opening degree of the water conservancy switch on the sewage intercepting pipe of each section according to the received water quality monitoring signals.
In a preferred embodiment of the invention, the device for monitoring the water quality of the water body is a water quality detector, an online COD monitor, an online ammonia nitrogen monitor, an online TSS monitor, an online BOD monitor, an online NH monitor3The device for monitoring the water quality of the water body can monitor the concentration of pollutants in the water body, wherein the pollutants comprise TSS, COD, BOD, NH, etc3-N, TN or TP.
In a preferred embodiment of the present invention, the water quality detector may detect the water quality of the water body by using an electrode method, a UV optical method, an optical scattering method, or the like.
In a preferred embodiment of the present invention, the water switches on the sewage intercepting pipes of the respective sections are independently selected from one of valves (ball valves, gate valves, knife gate valves, butterfly valves, elevating rubber plate intercepting check valves, etc.), gates (upward opening gates, downward opening gates, etc.), weir gates (upward opening weir gates, downward opening weir gates, rotary weir gates, etc.), flaps (intercepting flaps, etc.).
In a preferred embodiment of the present invention, the division according to the area is not limited, and may cover a larger area, or may cover a smaller area, for example, the division may be performed according to an area of 0.04 to 2 square kilometers. One or more storm water treatment facilities may be included in the area.
In a preferred embodiment of the invention, the catch-off pipes of each of the sectors are connected to a rainwater treatment facility of that sector.
In a preferred embodiment of the invention, the storm water treatment facility is selected from at least one of a storage facility, an on-line treatment facility and a diversion well.
Example 2
A method for controlling sewage in a sewage intercepting pipe of each section in a drainage system to be converged into a storage facility during rainfall, wherein the drainage system comprises a plurality of sections divided according to areas, the sewage intercepting pipe of each section and the storage facility; the sewage intercepting pipes of the various areas are connected with a storage and regulation facility, and the tail end of the drainage system (namely the tail end of the storage and regulation facility) is connected with a sewage treatment plant;
the drainage system also comprises water conservancy switches arranged on the sewage intercepting pipes of the respective areas;
the drainage system also comprises a control system, wherein the control system comprises a device for monitoring the water quality of the water body and a control unit in signal connection with the device; the control unit is in signal connection with the water conservancy switches on the sewage intercepting pipes of the various areas; the monitoring device is used for monitoring water quality, generating water quality monitoring signals, and transmitting the generated water quality monitoring signals to the control unit, and the control unit controls the opening degree of the water conservancy switch on the sewage intercepting pipe of each section according to the received water quality monitoring signals.
A) When the storage facility does not reach the upper accommodation limit, the flow of the sewage intercepting pipes of each section is not controlled, and when the sewage interception of a certain section is finished, the sewage intercepting pipes of the corresponding section are closed; and/or
B) When the storage regulation facility reaches the upper limit of the accommodation, the following control method is adopted:
assuming that the maximum flow rate which can be actually accepted by the end of the system (namely the end of the storage facility) is Q, Q is the minimum value of Q1 and Q2, wherein Q1 is the maximum flow rate of the sewage treatment plant capable of treating the sewage, and Q2 is the maximum flow rate of the storage facility discharged to the sewage treatment plant;
the method comprises the following steps:
monitoring the pollution degree of the water body in the sewage interception pipes of each plot, and controlling the flow rate of the sewage interception pipes of each plot, which are converged into the tail end of the system (namely the tail end of the storage facility), according to the different pollution degrees, so that the sum of the flow rates of the sewage interception pipes of each plot is equal to the maximum flow rate Q actually accepted by the tail end of the system (namely the tail end of the storage facility), wherein the method comprises the following steps:
1) when the water pollution degree is different: opening the sewage intercepting pipes of the corresponding areas according to the sequence of the water pollution degrees in the sewage intercepting pipes of the areas from large to small until the sum of the flow rates of the sewage intercepting pipes of the areas is equal to the maximum flow rate Q which can be actually accepted by the tail end of the system (namely the tail end of the storage facility);
specifically, the water quality of the water body in the sewage intercepting pipes of each section is monitored, according to the sequence that the water body pollution degree (the concentration of pollutants in the water body) is from large to small, namely C1, C2, C3, …, Cm, … and Cn, the sewage intercepting pipe with the concentration of the pollutants being C1 is opened, when a water switch on the sewage intercepting pipe with the concentration of the pollutants being C1 is opened to the maximum value, the flow at the tail end of the system (namely the tail end of the storage facility) is still lower than Q, the sewage intercepting pipe with the concentration of the pollutants being C2 is opened, when the water switch on the sewage intercepting pipe with the concentration of the pollutants being C2 is opened to the maximum value, the flow at the tail end of the system (namely the tail end of the storage facility) is still lower than Q, the sewage intercepting pipe with the concentration of the pollutants being C3 is continuously opened, and so on, when the water switch on the sewage intercepting pipe with the concentration of the pollutants being Cm is opened to the maximum value, the tail end of the system (namely the storage, properly adjusting the concentration of the pollutants to be the water conservancy switch on the sewage interception pipe corresponding to Cm, and enabling the flow at the tail end of the system (namely the tail end of the storage facility) to be equal to Q;
2) the water pollution degree is the same: controlling the flow rate of the sewage interception pipes of each sector to enable the sum of the flow rates of the sewage interception pipes of each sector to be equal to the maximum flow rate Q actually accepted by the tail end of the system (namely the tail end of the storage facility), wherein the control method selects one of the following methods:
(a) controlling the flow of the sewage interception pipes of each chip area to be the same; specifically, the flow rate of the sewage interception pipes in each chip area is controlled to be the same; the maximum flow Q actually accepted by the tail end of the system (namely the tail end of the storage facility) is evenly distributed to the sewage interception pipes of each section, so that the flow on the sewage interception pipes of each section is the same, and the sum is Q; for example, if a certain area comprises three areas, the flow rates of the sewage interception pipes of the three areas are Q/3;
(b) controlling the flow of the sewage interception pipes of each corresponding wafer area according to the area proportion of the catchment area corresponding to each wafer area; specifically, the flow rate of the sewage interception pipe of each corresponding wafer area is controlled according to the area proportion of the catchment area corresponding to each wafer area; that is, the maximum flow rate Q actually accepted by the system end (i.e. the end of the storage facility) is distributed to the flow rate of the sewage interception pipe of each corresponding zone according to the proportion of the area of the catchment area corresponding to each zone. For example, the maximum flow rate that can be practically accepted by the end of the system (i.e. the end of the storage facility) is Q, the system comprises three areas, the ratio of the areas of the catchment areas of the three areas is 2:1:3, then the flow rate ratio of the sewage interception pipes of the three areas is 2:1:3, namely the flow rates of the sewage interception pipes of the three areas are 2Q/6, Q/6 and 3Q/6 respectively;
(c) controlling the flow of the sewage interception pipes of the corresponding areas according to the proportion of the flow passage area of the sewage interception pipe of each area; specifically, the flow rate of the sewage interception pipes of each corresponding slice area is controlled according to the proportion of the flow passage area of the sewage interception pipe of each slice area; the maximum flow Q actually accepted by the system tail end (namely the tail end of the storage facility) is distributed to the flow of the sewage interception pipes of the corresponding areas according to the proportion of the flow area of the sewage interception pipes of the areas; for example, the maximum flow rate that can be actually accepted by the end of the system (i.e., the end of the storage facility) is Q, the system comprises three areas, the ratio of the flow passage areas of the sewage interception pipes of the three areas is 4:5:6, and then the flow rate ratio of the sewage interception pipes of the three areas is 4:5:6, namely the flow rates of the sewage interception pipes of the three areas are 4Q/15, 5Q/15 and 6Q/15 respectively;
3) setting a pollutant concentration standard discharge value C0 in a control unit of the control system according to the environmental capacity of the discharged natural water body and the water body pollution degree in the parcel; when the water pollution degree of a certain area reaches a set pollutant concentration standard discharge value C0 and the sewage interception of the area is finished, closing the sewage interception pipe corresponding to the area, and continuously controlling the flow of the sewage interception pipes of other areas according to the method; specifically, for example, the maximum flow rate that can be practically accepted by the end of the system (i.e. the end of the storage facility) is Q, the system comprises three sections, when the degree of water pollution of the first section reaches the set pollutant concentration standard discharge value C0, which indicates that the section is completely intercepted, the interception pipe of the section is closed, and the flow rate of the interception pipes of the second section and the third section is continuously controlled according to the method.
Example 3
The embodiment provides a control system suitable for the method in embodiment 1 or embodiment 2, wherein the control system comprises a device for monitoring the water quality of a water body and a control unit in signal connection with the device; the control unit is in signal connection with the water conservancy switches on the sewage intercepting pipes of the various areas; the monitoring device is used for monitoring water quality, generating water quality monitoring signals, and transmitting the generated water quality monitoring signals to the control unit, and the control unit controls the opening degree of the water conservancy switch on the sewage intercepting pipe of each section according to the received water quality monitoring signals.
In a preferred embodiment of the invention, the device for monitoring the water quality of the water body is a water quality detector, an online COD monitor, an online ammonia nitrogen monitor, an online TSS monitor, an online BOD monitor, an online NH monitor3The device for monitoring the water quality of the water body can monitor the concentration of pollutants in the water body, wherein the pollutants comprise TSS, COD, BOD, NH, etc3-N, TN or TP. The water quality detector can detect the water quality of the water body by adopting an electrode method, a UV optical method, an optical scattering method and the like.
The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for controlling sewage in a sewage intercepting pipe of each section in a drainage system to be converged into a storage facility during rainfall is characterized in that the drainage system comprises a plurality of sections divided according to areas, the sewage intercepting pipe of each section and the storage facility; the sewage intercepting pipes of the areas are connected with a storage and regulation facility, and the tail end of the drainage system is connected with a sewage treatment plant;
A) when the storage facility does not reach the upper accommodation limit, the flow of the sewage intercepting pipes of each section is not controlled, and when the sewage interception of a certain section is finished, the sewage intercepting pipes of the corresponding section are closed; and/or
B) When the storage regulation facility reaches the upper limit of the accommodation, the following control method is adopted:
assuming that the maximum flow rate which can be actually accepted by the tail end of the system is Q, Q is the minimum value of Q1 and Q2, wherein Q1 is the maximum flow rate of the sewage treatment plant which can treat the sewage, and Q2 is the maximum flow rate of the storage and regulation facility discharged to the sewage treatment plant;
the method comprises the following steps:
monitoring the pollution degree of water in the sewage interception pipes of each block, and controlling the flow rate of the sewage interception pipes of each block converging into the tail end of the system according to different pollution degrees, so that the sum of the flow rates of the sewage interception pipes of each block is equal to the maximum flow rate Q actually accepted by the tail end of the system, wherein the method comprises the following steps:
1) when the water pollution degree is different: opening the sewage intercepting pipes corresponding to the areas in the sequence of the water pollution degrees in the sewage intercepting pipes of the areas from large to small until the sum of the flow rates of the sewage intercepting pipes of the areas is equal to the maximum flow rate Q which can be actually received by the tail end of the system;
2) the water pollution degree is the same: controlling the flow rate of the sewage interception pipes of each chip area to enable the sum of the flow rates of the sewage interception pipes of each chip area to be equal to the maximum flow rate Q which can be actually accepted by the tail end of the system, wherein the control method selects one of the following methods:
(a) controlling the flow of the sewage interception pipes of each chip area to be the same;
(b) controlling the flow of the sewage interception pipes of each corresponding wafer area according to the area proportion of the catchment area corresponding to each wafer area;
(c) controlling the flow of the sewage interception pipes of the corresponding areas according to the proportion of the flow passage area of the sewage interception pipe of each area;
3) setting a pollutant concentration standard emission value C0; when the water pollution degree of a certain area reaches a set pollutant concentration standard discharge value C0 and the sewage interception of the area is finished, closing the sewage interception pipe corresponding to the area, and continuously controlling the flow of the sewage interception pipes of other areas according to the method;
wherein, the step 1) comprises the following steps:
monitoring the water quality of water bodies in the sewage interception pipes of each district, firstly opening the sewage interception pipe corresponding to the pollutant concentration of C1 according to the sequence of the water body pollution degrees from large to small, namely C1, C2, C3, …, Cm, … and Cn, when the water switch on the sewage interception pipe corresponding to the pollutant concentration C1 is opened to the maximum value, the flow at the tail end of the system is still lower than Q, then the pollutant intercepting pipe with the pollutant concentration of C2 is opened, the flow at the tail end of the system is still lower than Q when the water switch on the pollutant intercepting pipe with the pollutant concentration of C2 is opened to the maximum value, then continuing to open the pollutant intercepting pipe corresponding to the pollutant concentration C3, and so on, when the water switch on the pollutant intercepting pipe corresponding to the pollutant concentration Cm is opened to the maximum, the flow at the tail end of the system is caused to exceed Q, properly adjusting the concentration of the pollutants to be a water conservancy switch on the sewage interception pipe corresponding to Cm to enable the flow at the tail end of the system to be equal to Q;
setting a pollutant concentration standard discharge value C0 in a control unit of the control system according to the environmental capacity of the discharged natural water body and the water body pollution degree in the parcel;
in the step 2), the step of controlling the flow rate of the sewage intercepting pipe of each corresponding slice area according to the proportion of the flow channel area of the sewage intercepting pipe of each slice area is that the flow rate of the sewage intercepting pipe of each corresponding slice area is distributed according to the proportion of the flow channel area of the sewage intercepting pipe of each slice area, the sum of the flow rates of the sewage intercepting pipes of each slice area is equal to Q, and the proportion of the flow channel area of the sewage intercepting pipe of each slice area is the same as the proportion of the flow rate distributed by the sewage intercepting pipe of each corresponding slice area;
in step 2), the step of controlling the flow rate of the sewage intercepting pipes of the corresponding slice areas according to the proportion of the areas of the catchment areas corresponding to the slice areas means that the flow rate of the sewage intercepting pipes of the corresponding slice areas is distributed according to the proportion of the areas of the catchment areas corresponding to the slice areas, the sum of the flow rates of the sewage intercepting pipes of the slice areas is equal to Q, and the proportion of the flow channel areas of the sewage intercepting pipes of the slice areas is the same as the proportion of the flow rate distributed by the sewage intercepting pipes corresponding to the slice areas.
2. The method of claim 1, wherein the storage facilities comprise a storage tank, a storage culvert, a catch culvert, a deep tunnel, or a shallow tunnel.
3. The method of claim 1, wherein the drainage system further comprises a water switch disposed on the catch pipe of each slice.
4. The method of claim 3, wherein the drainage system further comprises a control system comprising a device for monitoring the quality of the water body and a control unit in signal connection therewith; the control unit is in signal connection with the water conservancy switches on the sewage intercepting pipes of the various areas; the device of monitoring water quality is used for monitoring water quality, generates water quality monitoring signal, carries the water quality monitoring signal who generates for the control unit, and the control unit is according to the aperture of the water conservancy switch on the pipe of intercepting sewage of the water quality monitoring signal control each district that receives.
5. The method of claim 4, wherein the device for monitoring the water quality of the water body is a water quality detector, an online COD monitor, an online ammonia nitrogen monitor, an online TSS monitor, an online BOD monitor, an online NH monitor3The device for monitoring the water quality of the water body monitors the concentration of pollutants in the water body, wherein the pollutants comprise TSS, COD, BOD, NH3-N, TN or TP.
6. The method of claim 3, wherein the water switches on the sewage intercepting pipes of the respective sections are each independently selected from one of a ball valve, a gate valve, a knife gate valve, a butterfly valve, a lifting rubber plate intercepting check valve, an upward opening gate, a downward opening gate, an upward opening weir, a downward opening weir, a rotating weir, and an intercepting flap valve.
7. The method of claim 1, wherein said partitioning by area is by area of 0.04-2 square kilometers;
the area comprises one or more storm water treatment facilities;
the sewage intercepting pipes of all the areas are connected with the rainwater treatment facilities of the areas;
the storm water treatment facility is selected from at least one of a storage facility, an on-line treatment facility, and a diversion well.
8. A control system suitable for use in the method of any one of claims 1 to 7, wherein the control system comprises means for monitoring the quality of the water and a control unit in signal communication therewith; the control unit is in signal connection with the water conservancy switches on the sewage intercepting pipes of the various areas; the device of monitoring water quality is used for monitoring water quality, generates water quality monitoring signal, carries the water quality monitoring signal who generates for the control unit, and the control unit is according to the aperture of the water conservancy switch on the pipe of intercepting sewage of the water quality monitoring signal control each district that receives.
9. The control system of claim 8, wherein the means for monitoring the water quality is a water quality detector, an online COD monitor, an online ammonia nitrogen monitor, an online TSS monitor, an online BOD monitor, an online NH monitor3The device for monitoring the water quality of the water body monitors the concentration of pollutants in the water body, wherein the pollutants comprise TSS, COD, BOD, NH3-N, TN or in TPOne or more of (a).
10. The control system of claim 9, wherein the water quality detector detects the water quality of the water body by an electrode method, a UV optical method or an optical scattering method.
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